var min=10;
var max=24;
function increaseFontSize() {
   var p = document.getElementsByTagName('p');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 13;
      }
      if(s!=max) {
         s += 1;
      }
      p[i].style.fontSize = s+"px"
   }
}
function resetFontSize() {
   var p = document.getElementsByTagName('p');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = 14;
      }
      p[i].style.fontSize = s+"px"
   }
}
function getImgSize(imgSrc,ab)
{
var newImg = new Image();
newImg.src = imgSrc;
var hheight = newImg.height;
var wwidth = newImg.width;
zoom(wwidth,hheight,'myimage',ab)
//alert ('The image size is '+width+'*'+height);
}

function decreaseFontSize() {
   var p = document.getElementsByTagName('p');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=min) {
         s -= 1;
      }
      p[i].style.fontSize = s+"px"
   }   
}

var zoomfactor=0.05 //(0.05=5%)

function zoomhelper(){
if (parseInt(whatcache.style.width)>10&&parseInt(whatcache.style.height)>10){
whatcache.style.width=parseInt(whatcache.style.width)+parseInt(whatcache.style.width)*zoomfactor*prefix
whatcache.style.height=parseInt(whatcache.style.height)+parseInt(whatcache.style.height)*zoomfactor*prefix
}
}

function zoom(originalW, originalH, what, state){
if (!document.all&&!document.getElementById)
return
whatcache=eval("document.images."+what)
prefix=(state=="in")? 1 : -1
if (whatcache.style.width==""||state=="restore"){
whatcache.style.width=originalW+"px"
whatcache.style.height=originalH+"px"
if (state=="restore")
return
}
else{
zoomhelper()
}
beginzoom=zoomhelper()
}

function clearzoom(){
if (window.beginzoom)
clearInterval(beginzoom)
}